A SoC like the i.MX6 supports more then one i2c bus. In oder to be
able to use the eeprom command add a new define to specify the
i2c bus to use. If CONFIG_SYS_I2C_EEPROM_BUS is not defined there
is no functional change, else a call to i2c_set_bus_num(..) is
done before calling i2c_read(..) and i2c_write(..).
Signed-off-by: Christian Gmeiner <christian.gmei...@gmail.com>
---
README | 3 +++
common/cmd_eeprom.c | 6 ++++++
2 files changed, 9 insertions(+)
diff --git a/README b/README
index ba57dc5..f38ab15 100644
--- a/README
+++ b/README
@@ -4341,6 +4341,9 @@ to save the current settings.
If defined, specified the chip address of the EEPROM device.
The default address is zero.
+ - CONFIG_SYS_I2C_EEPROM_BUS:
+ If defined, specified the i2c bus of the EEPROM device.
+
- CONFIG_SYS_EEPROM_PAGE_WRITE_BITS:
If defined, the number of bits used to address bytes in a
single page in the EEPROM device. A 64 byte page, for example
diff --git a/common/cmd_eeprom.c b/common/cmd_eeprom.c
index 29f0f1f..e9904cd 100644
--- a/common/cmd_eeprom.c
+++ b/common/cmd_eeprom.c
@@ -161,6 +161,9 @@ int eeprom_read (unsigned dev_addr, unsigned offset, uchar
*buffer, unsigned cnt
#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
spi_read (addr, alen, buffer, len);
#else
+#if defined(CONFIG_SYS_I2C_EEPROM_BUS)
+ i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS);
+#endif
if (i2c_read(addr[0], offset, alen - 1, buffer, len))
rcode = 1;
#endif
@@ -339,6 +342,9 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar
*buffer, unsigned cn
/* Write is enabled ... now write eeprom value.
*/
#endif
+#if defined(CONFIG_SYS_I2C_EEPROM_BUS)
+ i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS);
+#endif
if (i2c_write(addr[0], offset, alen - 1, buffer, len))
rcode = 1;
--
2.1.0
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
